Impact of Cigar Flavor in Dual Users

Inclusion Criteria: * Current regular dual uses of filtered cigars and cigarillos (FCs) and cigarettes defined as; (a) report smoking cigarettes at least weekly in the past 30 days, (b) report smoking unaltered FC (without marijuana) at least weekly in the past 30 days; and (c)report cigarette and cigar use at their current rate (or more frequently) for ≥ 3 months. * Able to read, speak, and understand English * Age 21-34 years * Stable residence (does not intend to move during the study period) * Not intending to quit smoking during the study period * Has a smart phone with a data plan (this study is being done remotely) * Saliva cotinine level \>30 ng/mL Exclusion Criteria: * Self-reported current pregnancy, currently trying to become pregnant, or breast-feeding * Current use of nicotine replacement products or cessation products (e.g., bupropion) or plans to use in the next 3 weeks for the purposes of cessation. * Diagnosed with or being treated for COPD, emphysema, and/or uncontrolled asthma as determined by research screening. * Currently taking anti-hypertensive medications * Currently has pneumonia, bronchitis, or COVID symptoms that has not yet resolved, or was hospitalized or visited the ER in the past 4 weeks for a respiratory-related illness that has not yet resolved (can be re-screened once resolved) * Resident of Alaska, Hawaii, or Massachusetts